Shares of solar and alternative energy providers have received a much-needed shot in the arm after news emerged that China is considering a $220B stimulus package to shore up its sluggish economy. Solar-related names posted big gains on Tuesday, led by Chinese solar product manufacturers Daqo New Energy (NYSE: DQ) +14.6% and JinkoSolar (NYSE: JKS) +13.2%, while solar tracking systems provider Array Technologies (NASDAQ: ARRY) +10.3% and Canadian solar module manufacturer Canadian Solar (NASDAQ: CSIQ) +9.3% also impressed. Other top-gainers…